During fiscal year 2024, the increase in the Company’s goodwill primarily related to the Inmarsat Acquisition (see Note 4 — Acquisitions for more information) and foreign currency translation effect recorded within all three of the Company's segments. During fiscal year 2023, the decrease in the Company's goodwill relating to its continuing operations primarily related to the derecognition of an insignificant amount (approximately $8.5 million) of goodwill during the fourth quarter of fiscal year 2023 in the Company's government systems segment that was previously not classified as held for sale. See Note 5 — Discontinued Operations for more information on discontinued operations. Additionally, the Company recorded an insignificant decrease of goodwill related to foreign currency translation effects across all three segments.

Other acquired intangible assets are amortized using the straight-line method over their estimated useful lives of two to 20 years (which approximates the economic pattern of benefit). Amortization expense related to other acquired intangible assets was $227.2 million, $29.8 million and $28.7 million for the fiscal years ended March 31, 2024, 2023 and 2022, respectively.

Other acquired intangible assets and the related accumulated amortization as of March 31, 2024 and 2023 is as follows:


			As of March 31, 2024							As of March 31, 2023
	Weighted Average Useful Life		Total		Accumulated Amortization			Net Book Value		Total		Accumulated Amortization			Net Book Value
	(In years)		(In thousands)
Contracts and customer relationships		11	$	1,437,738	$	(148,271	)	$	1,289,467	$	132,563	$	(34,202	)	$	98,361
Orbital slots and spectrum assets		12		1,088,600		(83,600	)		1,005,000		8,600		(8,600	)		—
Technology		7		251,889		(108,414	)		143,475		151,327		(83,949	)		67,378
Trade names		8		117,280		(24,770	)		92,510		32,253		(12,657	)		19,596
Other		11		21,792		(7,777	)		14,015		21,782		(5,912	)		15,870
Total other acquired intangible assets		11	$	2,917,299	$	(372,832	)	$	2,544,467	$	346,525	$	(145,320	)	$	201,205

The expected amortization expense of amortizable acquired intangible assets may change due to the effects of foreign currency fluctuations as a result of international businesses acquired. Expected amortization expense for acquired intangible assets for each of the following periods is as follows:


	Amortization
	(In thousands)
Expected for fiscal year 2025	$	269,313
Expected for fiscal year 2026		269,161
Expected for fiscal year 2027		269,161
Expected for fiscal year 2028		269,161
Expected for fiscal year 2029		268,416
Thereafter		1,199,255
	$	2,544,467

In fiscal year 2023, the gross amount and accumulated amortization for acquired identifiable intangible assets were reduced by the retirement of fully amortized assets that were no longer in use.